Table 3

Details of the final 17 items of the ASAS HI

Summary statisticsPerson-Separation Indexχ2 ProbabilityItem location (mean±SD)Item fit residual (mean±SD)Person location (mean±SD)Person Fit residual (mean±SD)
ASAS Health Index (final 17 items)0.820.730.0±1.80.0±1.20.0±1.8−0.3±0.7
CategoriesDifficulty levelFit residualχ2 probabilityκ agreementICFOrigin
Pain−3.3−0.90.770.6b280Patient proposal
Maintaining a body position−1.3−0.50.670.7d415NHP, DFI, BASFI (adapted)
Moving around−2.8− (adapted)
Energy and drive−1.9− proposal
Sexual functions0. proposal
Driving2.0− proposal
Community life1.8−
Moving around3. (adapted)
Handling stress0.1−
Recreation and leisure0.4−
Emotional functions−1.2−, ASQoL
Washing oneself1., HAQ (adapted)
Economic self-sufficiency− Status Scale (adapted)
Sleep−, RAQoL
Handling stress1.2− (adapted)
  • ASAS HI, Assessment of SpondyloArthritis international Society Health Index; ASQol, Ankylosing Spondylitis Quality of Life; BASFI, Bath Ankylosing Spondylitis Functional Index; DFI, Dougados Functional Index; GHQ, General Health Questionnaire; HAQ-S, Health Assessment Questionnaire; ICF, International Classification of Functioning, Disability and Health; MSQoL, Multiple Sclerosis Quality of Life Inventory; NHP, Nottingham Health Profile; RAQoL, Rheumatoid Arthritis Quality of Life.